Switchgear state display device

Abstract

Included are: a movable plate which is coupled to a main shaft of the switchgear and performs motion in accordance with the movement of the main shaft; an ON/OFF display plate in which a display showing the state of the switchgear, such as “ON”/“OFF,” is provided on each of different two faces, and mechanically rotates or performs linear motion and thus displaying the opening/closing state of the contact; and an ON/OFF display plate link which is mechanically connected to the movable plate and the ON/OFF display plate and converts the motion of the movable plate to transfer to the ON/OFF display plate. The display of the ON/OFF display plate is arranged at a tilt toward the upper side or the lower side so as to point at an optional angle.

The invention claimed is: 
     
       1. A switchgear state display device, comprising:
 a display plate which is coupled to a main shaft of a switchgear, and is provided with a display showing the state of said switchgear on a first display face and a second display face, so that movement of said main shaft moves the display plate to point either the first display face or the second display face toward a display window of a front cover arranged along a vertical surface of said switchgear by mechanically rotating the display plate or moving the display plate linearly; and 
 a display plate link which is coupled to said main shaft of said switchgear and said display plate, and converts the movement of said main shaft to said display plate, 
 wherein a coupling position of said display plate with said display plate link is adjustable via a plurality of connection points; and 
 the first display face and the second display face points toward to the display window at an angle greater than zero formed by a first line perpendicular to the vertical surface and a second line perpendicular to the first display face or the second display face that is pointing toward the display window, and the other of the first display face and the second display face points in a direction other than towards the display window. 
 
     
     
       2. The switchgear state display device according to  claim 1 , further comprising:
 a mechanical operation counter which counts a number of opening/closing times of the switchgear by rotation of a driving lever; and 
 a tension spring which is coupled to said display plate and said driving lever to interlock said display plate with said mechanical operation counter, and 
 wherein said mechanical operation counter displays the number of opening/closing times at an angle through a second window of the front cover. 
 
     
     
       3. The switchgear state display device according to  claim 1 , further comprising:
 a rotary auxiliary switch; 
 a movable plate attached to said main shaft; 
 an arm which is coupled to a rotational shaft of said auxiliary switch; and 
 an auxiliary switch link which is coupled to said movable plate and said arm, and converts motion of said movable plate to said auxiliary switch, and 
 wherein an opening/closing state of a contact is displayed in accordance with movement of the switchgear, and at the same time, said auxiliary switch is switched. 
 
     
     
       4. The switchgear state display device according to  claim 2 , further comprising:
 a rotary auxiliary switch; 
 a movable plate attached to said main shaft; 
 an arm which is coupled to a rotational shaft of said auxiliary switch; and 
 an auxiliary switch link which is coupled to said movable plate and said arm, and converts motion of said movable plate to said auxiliary switch, and 
 wherein an opening/closing state of a contact is displayed in accordance with movement of said switchgear, the number of opening/closing times that is counted, and at the same time, said auxiliary switch is switched. 
 
     
     
       5. A switchgear comprising the switchgear state display device as set forth in  claim 1 . 
     
     
       6. A switchgear comprising the switchgear state display device as set forth in  claim 2 . 
     
     
       7. A switchgear comprising the switchgear state display device as set forth in  claim 3 . 
     
     
       8. A switchgear comprising the switchgear state display device as set forth in  claim 4 . 
     
     
       9. The switchgear state display device according to  claim 1 , wherein the angle is adjustable. 
     
     
       10. The switchgear state display device according to  claim 1 , wherein the first display face faces toward the main shaft when the second display face faces toward the display window. 
     
     
       11. The switchgear state display device according to  claim 1 , wherein the first display face and the second display face are positioned on the display plate at an angle of 90 degrees relative to each other. 
     
     
       12. The switchgear state display device according to  claim 1 , wherein the main shaft extends in a direction parallel with the vertical surface of the switchgear.